CN103647447A - Power supply device of communication module of electric energy meter - Google Patents
Power supply device of communication module of electric energy meter Download PDFInfo
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- CN103647447A CN103647447A CN201310728537.5A CN201310728537A CN103647447A CN 103647447 A CN103647447 A CN 103647447A CN 201310728537 A CN201310728537 A CN 201310728537A CN 103647447 A CN103647447 A CN 103647447A
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- voltage
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Abstract
The invention belongs to the technical field of power supplies of an electric energy meter and relates to a power supply device of a communication module of the electric energy meter. The main structure of the power supply device comprises an input filter circuit, a control chip, an undervoltage protection circuit, a feedback circuit and an output filter circuit. Input voltage is output voltage of a linear power supply of a base meter of the electric energy meter and is input to the control chip after being filtered through the input filter circuit, high-frequency adjustment is preformed on the input voltage through a metal-oxide-semiconductor field effect transistor (MOSFET) in the control chip, and then the input voltage is output to the output filter circuit. After a high-frequency signal is filtered through the output filter circuit, a direct-current voltage signal is output to the communication module of the electric energy meter, the feedback circuit samples the direct-current voltage signal and inputs the direct-current voltage signal into the control chip to perform high precision operation amplification to regulate output voltage amplitude, and a voltage-regulator diode and a resistor form the undervoltage protection circuit. The power supply device of the communication module of the electric energy meter is simple in structure, low in cost, small in size, less in power consumption, high in efficiency and precision, wide in input range, constant in output voltage, small in ripple wave, protective in input and output and stable and reliable.
Description
Technical field:
The invention belongs to the power technique fields of electric energy meter; relate to a kind of DCDC power configuration circuit; especially a kind of circuit arrangement of work and communication power supply being provided to electric energy meter communication module; thereby while breaking down due to communication module to solve, cause inputting the excessive initiation of linear supply voltage fall electric energy meter operation irregularity; and with under-voltage and overcurrent protection function, realize the stable power-supplying of electric energy meter communication module.
Background technology:
Electric energy meter is for measuring the instrument of electric energy, the high-precision A/D converter of its general employing is sampled the voltage of electrical network, current signal and analog-to-digital conversion, then utilize high speed microprocessor to digital signal analyze, the reprocessing of processing and data, sorting, thereby produce various continuous datas, recycle various communication interfaces, man-machine interface and realize and the docking of various device.Continuous propelling along with low pressure centralized automatic meter-reading, electric energy meter improves constantly the demand of communication function, plug-in communication module miscellaneous continues to bring out, yet different communication modes as power line carrier, ZigBee, the module such as micropower is wireless, GPRS and optical fiber differs widely to the requirement of power supply, especially the precision of power supply and ripple have been proposed to very high requirement, this just needs the power interface of electric energy meter outfit standard to meet the demand of different communication module; The electric power output voltage that traditional electric energy meter provides external communication module is produced by electric energy meter base table self linear power supply, general and the electric energy meter built-in system power supply of this linear power supply is the same circuit, without isolation, but the power supply of communication module can change along with voltage ripple of power network, make output voltage unstable, conventionally tens volts between more than 20 volts not etc., ripple coefficient is also larger, and output unprotect, run into electric network thunder and lightning or impact load surge impact will directly involve communication module; When communication module short circuit or fault power consumption are when larger, electric energy meter base table linear power supply output unprotect will cause showing interior system power supply voltage and be dragged down in addition, and even dead short circuit, causes electric energy meter cisco unity malfunction, brings and makes a very bad impression, and loss seriously.Therefore; seeking design provides a kind of DCDC power circuit of electric energy meter communication module to replace the linear power supply of electric energy meter self; according to input voltage amplitude, accurately control the opportunity of power remove, realize the stable power-supplying of communication module, there is good protective effect and practical value.
Summary of the invention:
The object of the invention is to overcome the shortcoming that prior art exists, seek the supply unit that design provides a kind of electric energy meter communication module, it has under-voltage and overcurrent protection function, can accurately control according to input voltage amplitude the opportunity of power remove.
To achieve these goals; the supply unit agent structure of the electric energy meter communication module the present invention relates to comprises input filter circuit, control chip, under-voltage protecting circuit, feedback circuit and output filter circuit, between the first pin A of control chip and the 6th pin F and be connected to capacitor C
2, between the 4th pin D of control chip and the 5th pin E and be connected to under-voltage protecting circuit, under-voltage protecting circuit is by diode D
2series resistance R
4with capacitor C
6after in parallel, ground connection forms, diode D
2be connected to the capacitor C of parallel-connection structure with the 5th pin E junction of control chip
1with C
5, capacitor C
1with capacitor C
5formation input filter circuit in parallel; The 3rd pin C of control chip is connected to feedback circuit, and the 6th pin F of control chip is connected to output filter circuit, and the signals collecting end of feedback circuit is connected with the output of output filter circuit, and feedback circuit is by resistance R
1series resistance R
2again with capacitor C
4formation in parallel; The input of output filter circuit is by connecting diode D
1ground connection is also connected inductor L in output filter circuit with the 6th pin F of control chip
1input end grounding be parallel with capacitor C simultaneously
7and C
3, realize the filtering of output voltage signal; Input voltage VCC is the output voltage of electric energy meter base table linear power supply, the capacitor C in input filter circuit
1and C
5after filtering, be input to control chip, control chip adopts DCDC chip BD9676, control chip after the metal-oxide half field effect transistor MOSFET high frequency of its inside is adjusted, exports input voltage VCC to output filter circuit, and high-frequency signal is through the diode D in output filter circuit
1afterflow and inductance L
1, capacitor C
3, C
7after filtering, export high-precision d. c. voltage signal VDD to electric energy meter communication module, its vdd voltage value is 11-12V, and ripple is less than 1 ‰; Feedback circuit sampling d. c. voltage signal VDD is also input in control chip and carries out high-operational amplifier to adjust output voltage amplitude; Voltage stabilizing didoe D
2with resistance R
4, capacitor C
6form under-voltage protecting circuit, its enable voltage that inputs to control chip is 2.0V, when enable voltage is more than or equal to 2.0V, and control chip start; When enable voltage is less than 2.0V, control chip shuts down, thereby realizes the control of power remove.
Compared with prior art, input voltage is provided by electric energy meter base table linear power supply in the present invention, and the constant and ripple of output voltage is less than 1 ‰, has output overcurrent defencive function and input undervoltage defencive function, when enable pin voltage turn-offs output during lower than setting voltage value; Input undervoltage protection circuit is according to the ena-bung function of control chip, can accurately control power remove opportunity according to input voltage amplitude; It is simple in structure, and cost is low, and volume is little, and power consumption is little, and efficiency is high, and input range is wide, and output voltage is constant, and precision is high, and ripple is little, and input and output have protection, reliable and stable.
Accompanying drawing explanation:
Fig. 1 is the circuit arrangement structure principle schematic the present invention relates to.
Fig. 2 is the structural principle schematic block diagram that the present invention and input and output side are connected.
Embodiment:
Below in conjunction with accompanying drawing and by embodiment, the present invention is made to further description.
Embodiment 1:
The Circnit Layout of the supply unit of the electric energy meter communication module that the present embodiment relates to as shown in Figure 1; agent structure comprises input filter circuit 1, control chip 2, under-voltage protecting circuit 3, feedback circuit 4 and output filter circuit 5, between the first pin A of control chip 2 and the 6th pin F and be connected to capacitor C
2, between the 4th pin D of control chip 2 and the 5th pin E and be connected to under-voltage protecting circuit 3, under-voltage protecting circuit 3 is by diode D
2series resistance R
4with capacitor C
6after in parallel, ground connection forms, diode D
2be connected to the capacitor C of parallel-connection structure with the 5th pin E junction of control chip 2
1with C
5, capacitor C
1with capacitor C
5formation input filter circuit 1 in parallel; The 3rd pin C of control chip 2 is connected to feedback circuit 4, and the 6th pin F of control chip 2 is connected to output filter circuit 5, and the signals collecting end of feedback circuit 4 is connected with the output of output filter circuit 5, and feedback circuit 4 is by resistance R
1series resistance R
2again with capacitor C
4formation in parallel; The input of output filter circuit 5 is by connecting diode D
1ground connection is also connected inductor L in output filter circuit 5 with the 6th pin F of control chip 2
1input end grounding be parallel with capacitor C simultaneously
7and C
3, realize the filtering of output voltage signal; Input voltage VCC is the output voltage of electric energy meter base table linear power supply, the capacitor C in input filter circuit 1
1and C
5after filtering, be input to control chip 2, control chip 2 adopts DCDC chip BD9676, control chip 2 after the metal-oxide half field effect transistor MOSFET high frequency of its inside is adjusted, exports input voltage VCC to output filter circuit 5, and high-frequency signal is through the diode D in output filter circuit 5
1afterflow and inductance L
1, capacitor C
3, C
7after filtering, export high-precision d. c. voltage signal VDD to electric energy meter communication module, its vdd voltage value is 11-12V, and ripple is less than 1 ‰; Feedback circuit 4 sampling d. c. voltage signal VDD are also input in control chip 2 and carry out high-operational amplifier to adjust output voltage amplitude; Voltage stabilizing didoe D
2with resistance R
4, C
6form under-voltage protecting circuit 3, the enable voltage that inputs to control chip 2 is 2.0V, when enable pin input voltage is more than or equal to 2.0V, and control chip 2 starts; When enable pin input voltage is less than 2.0V, control chip 2 shutdown, realize the control of power remove.
Embodiment 2:
The supply unit of the electric energy meter communication module that the present embodiment relates to, the input of its input filter circuit 1 is connected with electric energy meter base table linear power supply telecommunications breath, the output of output filter circuit 5 is connected with electric energy meter communication module telecommunications breath, the output rectifier and filter and the electric energy meter system electric power generating composition application loop that externally connect electric energy meter transformer, during outside electric power network voltage 220V, electric energy meter base table linear power supply is the input voltage VCC that the invention provides 16-16.5V; After input filter circuit 1 filtering and control chip 2 high frequency adjustment, be transferred to output filter circuit 5, output filter circuit 5 output 12V ± 1V, ripple are less than 1 ‰ operating voltage VDD as the working power of electric energy meter communication module; Because electric energy meter communication module breaks down, to consume the output of operating voltage VDD power supply excessive; but input voltage VCC can not dragged down when also causing control chip 2 overcurrent protection; cause that electric energy meter base table resets or power-fail; the input protection threshold voltage of under-voltage protecting circuit 3 is set to 10V ± 0.2V; the electric energy meter communication module R4 dividing potential drop in input undervoltage protection circuit 3 while dragging down input voltage VCC to 10.2V that breaks down is 2V; control chip 2 shutdown, realize the shutdown opportunity that accurate control inputs voltage fluctuation causes.
Claims (1)
1. the supply unit of an electric energy meter communication module; it is characterized in that agent structure comprises input filter circuit, control chip, under-voltage protecting circuit, feedback circuit and output filter circuit, between first pin (A) of control chip and the 6th pin (F) and be connected to capacitor (C
2), between the 4th pin (D) of control chip and the 5th pin (E) and be connected to under-voltage protecting circuit, under-voltage protecting circuit is by diode (D
2), series resistance (R
4) and capacitor (C
6) rear ground connection formation in parallel, diode (D
2) be connected to the capacitor (C of parallel-connection structure with the 5th pin (E) junction of control chip
1) and (C
5), capacitor (C
1) and capacitor (C
5) formation input filter circuit in parallel; The 3rd pin (C) of control chip is connected to feedback circuit, and the 6th pin (F) of control chip is connected to output filter circuit, and the signals collecting end of feedback circuit is connected with the output of output filter circuit, and feedback circuit is by resistance (R
1) series resistance (R
2) again with capacitor (C
4) formation in parallel; The input of output filter circuit is by connecting diode (D
1) ground connection be connected inductor (L in output filter circuit with the 6th pin (F) of control chip
1) input end grounding be parallel with capacitor (C simultaneously
7) and (C
3), realize the filtering of output voltage signal; Input voltage (VCC) is the output voltage of electric energy meter base table linear power supply, the electric capacity (C in input filter circuit
1) and (C
5) be input to control chip after filtering, control chip adopts DCDC chip BD9676, control chip after the metal-oxide half field effect transistor MOSFET high frequency of its inside is adjusted, exports input voltage (VCC) to output filter circuit, and high-frequency signal is through the diode (D in output filter circuit
1) afterflow and inductance (L
1), capacitor (C
3), (C
7) output dc voltage signal (VDD) is given electric energy meter communication module after filtering, its (VDD) magnitude of voltage is 11-12V, ripple is less than 1 ‰; Feedback circuit sampling d. c. voltage signal (VDD) is also input in control chip and carries out high-operational amplifier to adjust output voltage amplitude; Voltage stabilizing didoe (D
2) and resistance (R
4), electric capacity (C
6) forming under-voltage protecting circuit, its enable voltage that inputs to control chip is 2.0V, when enable voltage is more than or equal to 2.0V, control chip start; When enable voltage is less than 2.0V, control chip shuts down, thereby realizes the control of power remove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310728537.5A CN103647447B (en) | 2013-12-25 | 2013-12-25 | The supply unit of a kind of electric energy table communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310728537.5A CN103647447B (en) | 2013-12-25 | 2013-12-25 | The supply unit of a kind of electric energy table communication module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103647447A true CN103647447A (en) | 2014-03-19 |
| CN103647447B CN103647447B (en) | 2016-06-01 |
Family
ID=50252624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310728537.5A Active CN103647447B (en) | 2013-12-25 | 2013-12-25 | The supply unit of a kind of electric energy table communication module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103647447B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107291134A (en) * | 2016-04-01 | 2017-10-24 | 上海华建电力设备股份有限公司 | A kind of GPRS module power circuit |
| CN108112112A (en) * | 2016-11-24 | 2018-06-01 | 上海航空电器有限公司 | One kind is suitable for powerful constant-current drive circuit |
| CN110265975A (en) * | 2019-05-09 | 2019-09-20 | 四川莱福德科技有限公司 | IC chip protects circuit |
| CN112486233A (en) * | 2020-11-26 | 2021-03-12 | 惠州市德赛西威汽车电子股份有限公司 | Circuit for preventing LDO from outputting peak voltage |
Citations (2)
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| WO2009068619A2 (en) * | 2007-11-28 | 2009-06-04 | Austriamicrosystems Ag | Circuit arrangement for dc/dc converters in particular and method for the control thereof |
| CN202840943U (en) * | 2012-09-17 | 2013-03-27 | 台州谊聚机电有限公司 | Power supply circuit of solar photovoltaic water pump |
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2013
- 2013-12-25 CN CN201310728537.5A patent/CN103647447B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009068619A2 (en) * | 2007-11-28 | 2009-06-04 | Austriamicrosystems Ag | Circuit arrangement for dc/dc converters in particular and method for the control thereof |
| CN202840943U (en) * | 2012-09-17 | 2013-03-27 | 台州谊聚机电有限公司 | Power supply circuit of solar photovoltaic water pump |
Non-Patent Citations (1)
| Title |
|---|
| 胡小巨: "LM5007在工业电表中的应用", 《电子技术应用》, no. 5, 31 May 2007 (2007-05-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107291134A (en) * | 2016-04-01 | 2017-10-24 | 上海华建电力设备股份有限公司 | A kind of GPRS module power circuit |
| CN108112112A (en) * | 2016-11-24 | 2018-06-01 | 上海航空电器有限公司 | One kind is suitable for powerful constant-current drive circuit |
| CN110265975A (en) * | 2019-05-09 | 2019-09-20 | 四川莱福德科技有限公司 | IC chip protects circuit |
| CN112486233A (en) * | 2020-11-26 | 2021-03-12 | 惠州市德赛西威汽车电子股份有限公司 | Circuit for preventing LDO from outputting peak voltage |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103647447B (en) | 2016-06-01 |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 266061 Shandong Province, Qingdao city Laoshan District Songling Road No. 169 room 413 Applicant after: QINGDAO ITECHENE TECHNOLOGIES Co.,Ltd. Address before: 266061 Shandong Province, Qingdao city Laoshan District Songling Road No. 169 room 413 Applicant before: Qingdao Techen Electronic Technology Co.,Ltd. |
|
| COR | Change of bibliographic data | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A power supply device for communication module of electric energy meter Effective date of registration: 20230224 Granted publication date: 20160601 Pledgee: China Construction Bank Corporation Qingdao Zhongshan Road sub branch Pledgor: QINGDAO ITECHENE TECHNOLOGIES Co.,Ltd. Registration number: Y2023370010022 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |